21602230017 has 4 divisors (see below), whose sum is σ = 28802973360. Its totient is φ = 14401486676.

The previous prime is 21602230003. The next prime is 21602230033. The reversal of 21602230017 is 71003220612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21602230017 - 2¹⁰ = 21602228993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21602230037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3600371667 + ... + 3600371672.

It is an arithmetic number, because the mean of its divisors is an integer number (7200743340).

Almost surely, 2^21602230017 is an apocalyptic number.

It is an amenable number.

21602230017 is a deficient number, since it is larger than the sum of its proper divisors (7200743343).

21602230017 is an equidigital number, since it uses as much as digits as its factorization.

21602230017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7200743342.

The product of its (nonzero) digits is 1008, while the sum is 24.

Adding to 21602230017 its reverse (71003220612), we get a palindrome (92605450629).

The spelling of 21602230017 in words is "twenty-one billion, six hundred two million, two hundred thirty thousand, seventeen".